辐射中微子模型中来自激发暗物质的3.55keVX射线线信号资源-CSDN文库

Open

Access

63 浏览量 2020-04-17 00:44:28 上传评论收藏 294KB PDF 举报

资源推荐

资源详情

资源评论

Physics Letters B 737 (2014) 162–166

Contents lists available at ScienceDirect

Physics Letters B

www.elsevier.com/locate/physletb

3.55 keV X-ray line signal from ex cited dark matter

radiative neutrino model

Hiroshi Okada

a,∗

, Takashi Toma

School of Physics, KIAS, Seoul 130-722, Republic of Korea

Institute for Particle Physics Phenomenology, University of Durham, Durham DH1 3LE, United Kingdom

a r t i c l e i n f o a b s t r a c t

Article history:

Received

27 April 2014

Received

in revised form 29 July 2014

Accepted

19 August 2014

Available

online 22 August 2014

Editor:

J. Hisano

We study an exciting dark matter scenario in a radiative neutrino model to explain the X-ray line signal

at 3.55 keV recently reported by XMN-Newton X-ray observatory using data of various galaxy clusters

and Andromeda galaxy. We show that the required large cross section for the up-scattering process to

explain the X-ray line can be obtained via the resonance of the pseudo-scalar. Moreover, this model can

be compatible with the thermal production of dark matter and the constraint from the direct detection

experiment.

(http://creativecommons.org/licenses/by/3.0/). Funded by SCOAP

1. Introduction

In the light of anomalous X-ray line signal at 3.55 keV from

the analysis of XMN-Newton X-ray observatory data of various

galaxy clusters and Andromeda galaxy [1,2], dark matter (DM)

whose mass is in the range from keV to GeV comes into one of

the promising candidates. Subsequently, a number of literatures re-

cently

arose around the subject [3–22]. As for the keV scale DM,

for example, a sterile neutrino can be one of the typical candidates

to explain the X-ray anomaly that requires tiny mixing between

the DM and the active neutrino; sin

2θ ≈ 10

−10

[1]. However,

these

scenarios suggest that neutrino masses cannot be derived

consistently with the sterile neutrino DM due to its too small mix-

ing.

Moreover, the sterile neutrino DM mass is out of the range in

the direct detection searches such as LUX [23], which is currently

the most powerful experiment to constrain the kind of Weakly In-

teracting

Massive Particle.

for the GeV scale DM, on the other hand, the exciting DM

scenario which requests a pair of ground state and excited DM

is known to explain the X-ray [7]. In this framework, the emis-

sion

of X-ray is simply realized as follows. After the ground state

DM up-annihilates into the excited DM pair, it can decay into pho-

tons

(X-ray) and the ground state DM. The mass difference among

them is assumed to be the energy of the X-ray, 3.55 keV. Since the

framework of the exciting DM is simple, this scenario can be appli-

cable

to various models such as radiative neutrino models [24–27].

Corresponding author.

E-mail

addresses: hokada@kias.re.kr (H. Okada), takashi.toma@durham.ac.uk

(T. Toma).

Table 1

The

new particle contents and the charges for bosons where i = 1–3 is generation

index.

Particle L

η ΦΣ

(SU(2)

, U (1)

)(2, −1/2)(1, −1)(1, 0)(2, 1/2)(2, 1/2)(1,0)

1 ωω

++−−++

In this kind of models, small neutrino masses and existence of DM

would be accommodated unlike the sterile neutrino DM scenar-

ios

above. Moreover, the DM can be testable in direct detection

searches because the DM mass is GeV scale.

this Letter, we account for the X-ray anomaly in terms of

an excited DM scenario in a simple extended model with radia-

tive

neutrino masses [25], in which three right-handed neutrinos,

a SU(2)

doublet scalar and a singlet scalar are added to the Stan-

dard

Model (SM) and the ﬁrst two lightest right-handed neutrinos

are assumed to be a pair of ground state and excited state DM.

2. The model

2.1. Model setup

The particle contents and charge assignments of the model we

consider are shown in Table 1. We introduce three right-handed

neutrinos N

(i = 1–3) where the ﬁrst two lightest ones are iden-

tiﬁed

to be a pair of ground state and excited state DM. We

also introduce a SU(2)

doublet inert scalar η that is assumed

not to have vacuum expectation value (VEV), and a gauge sin-

glet

boson Σ with non-zero VEV in addition to the SM like Higgs

boson Φ. The Z

symmetry is imposed to assure the stability

http://dx.doi.org/10.1016/j.physletb.2014.08.046

0370-2693/

SCOAP

本内容试读结束，登录后可阅读更多

下载后可阅读完整内容，剩余4页未读，立即下载

评论收藏

内容反馈

weixin_38679178

粉丝: 4
资源: 919

辐射中微子模型中来自激发暗物质的3.55 keV X射线线信号

最新资源

辐射中微子模型中来自激发暗物质的3.55 keV X射线线信号

来自7.1 keV自旋3/2暗物质衰变的异常X射线银河信号

来自7 keV轴突暗物质衰减的X射线线信号

来自类似轴突的暗物质的3.5keV的X射线线团

keV尺度上来自暗物质An灭的X射线线

中微子实验中来自时序谱的暗物质信号

νR适用于3.5 keV X射线信号的暗物质亲密希格斯

循环来自中微子入口暗物质的主导信号

新的νMSM（ννMSM）：辐射中微子质量，keV尺度的暗物质和具有亚TeV的可行的瘦细胞形成新物理学

无菌中微子暗物质和3.5 keV线的生产

改进的无菌中微子暗物质光谱测定

回顾数论暗物质情景和弱引力猜想

来自衰变的轴野温暖暗物质的X射线线信号

YAG产生的X射线诊断材料

通过暗光子致发光搜索增强的暗物质

使用尺度不变性将无菌中微子暗物质升级为FI m P

中微子线的伽马射线极限

中微子热通向亚MeV暗物质

具有辐射中微子质量和多部分暗物质的超对称左右模型

在KATRIN寻找无菌中微子暗物质的前景

简并右手中微子的辐射中微子质量模型

无菌中微子暗物质和带电标量的低尺度脂肪生成

惰性希格斯二重态模型中的辐射中微子质量和马约拉纳暗物质

带有辐射中微子质量的右旋中微子暗物质，已测量-模型

一类辐射中微子质量产生模型中带电轻子味道的违反

带有辐射中微子质量的惰性希格斯双峰暗物质的轻子门限

两环辐射中微子模型

辐射中微子质量模型中的银河系中心伽玛射线过量

最新资源